Laminated polyester film
US-11932742-B2 · Mar 19, 2024 · US
Laminated polyester film
US12516168B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12516168-B2 |
| Application number | US-202418434292-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 6, 2024 |
| Priority date | Oct 29, 2019 |
| Publication date | Jan 6, 2026 |
| Grant date | Jan 6, 2026 |
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- Title
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- Abstract
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Abstract
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An object of the present invention is to provide a laminated polyester film that has good adhesion to an UV-curable resin, particularly has excellent adhesion to a coating agent such as an UV-curable ink, and has an excellent property to keep the adhesion at a high level over a long period of time. A laminated polyester film comprising: a polyester film; and a coating layer on at least one surface of the polyester film, the coating layer comprising a composition containing a polyurethane resin having a carboxyl group and having an acid value of 30 to 50 mgKOH/g and a crosslinking agent having a carboxyl group and having an acid value of 30 to 50 mgKOH/g.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A laminated polyester film comprising a polyester film and a coating layer on at least one surface of the polyester film, wherein the coating layer comprises (a) particles and (b) a composition containing a polyurethane resin having a carboxyl group and having an acid value of 30 to 50 mgKOH/g and a crosslinking agent having a carboxyl group and having an acid value of 30 to 50 mgKOH/g, and wherein the laminated polyester film has a haze of 2.5% or less. 2 . The laminated polyester film according to claim 1 , wherein the crosslinking agent is an isocyanate compound. 3 . The laminated polyester film according to claim 1 , wherein the crosslinking agent is a blocked isocyanate having three or more functional groups. 4 . The laminated polyester film according to claim 1 , wherein the composition further comprises a polyester resin that contains as constituents (i) a dicarboxylic acid and (ii) a diol having a branched structure or a diol having one or more ether bonds. 5 . The laminated polyester film according to claim 2 , wherein the composition further comprises a polyester resin that contains as constituents (i) a dicarboxylic acid and (ii) a diol having a branched structure or a diol having one or more ether bonds. 6 . The laminated polyester film according to claim 3 , wherein the composition further comprises a polyester resin that contains as constituents (i) a dicarboxylic acid and (ii) a diol having a branched structure or a diol having one or more ether bonds.
Assignees
Inventors
Classifications
from polyesters · CPC title
Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) · CPC title
Manufacture of films or sheets · CPC title
Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers · CPC title
organic · CPC title
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Frequently asked questions
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- What does patent US12516168B2 cover?
- An object of the present invention is to provide a laminated polyester film that has good adhesion to an UV-curable resin, particularly has excellent adhesion to a coating agent such as an UV-curable ink, and has an excellent property to keep the adhesion at a high level over a long period of time. A laminated polyester film comprising: a polyester film; and a coating layer on at least one surf…
- Who is the assignee on this patent?
- Toyo Boseki
- What technology area does this patent fall under?
- Primary CPC classification C08J7/0427. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 06 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).